Driving circuit, driving method adapted for driving a data line of a display panel and method of establishing at least one predetermined table thereof

Abstract

A driving circuit and driving method adapted for driving a data line of a display panel are provided. At least one predetermined table is provided by a controller circuit and applied according to a polarity state of a pixel data in related to a polarity state of its previous pixel data. A first or second mapping table is selected when the two polarity states are identical. A third or fourth mapping table is selected when the two polarity states are different. A corresponding pixel voltage based on the selected mapping table is generated for driving the data line, such that polarity transition between two adjacent sub-pixel units using common data line is considered. In addition, a method of establishing the at least one predetermined table is proposed as well. The invention achieves in providing better visual performances and suppressing conventional visual defects on a liquid crystal display panel.

What is claimed is: 
     
         1 . A driving circuit adapted for driving a data line of a display panel, comprising:
 a controller circuit, being configured to provide at least one predetermined table and generate at least one pixel data according to the at least one predetermined table, wherein the at least one predetermined table is selected and applied according to a polarity state of a pixel data in related to a polarity state of a previous pixel data which is provided prior to the pixel data; and   an outputting circuit, being electrically connected to the controller circuit and coupled to the data line for driving the data line of the display panel with at least one pixel voltage associated with the at least one pixel data;   wherein a first predetermined table from the at least one predetermined table is selected and applied to generate a first pixel data associated with a first pixel voltage to drive the data line of the display panel when a polarity state of the first pixel data and a polarity state of a previous pixel data which is provided prior to the first pixel data are identical, and a second predetermined table from the at least one predetermined table is selected and applied to generate a second pixel data associated with a second pixel voltage to drive the data line of the display panel when a polarity state of the second pixel data and a polarity state of a previous pixel data which is provided prior to the second pixel data are different.   
     
     
         2 . The driving circuit adapted for driving the data line of the display panel according to  claim 1 , wherein the first predetermined table includes a first mapping table, where the first mapping table is applied when the polarity state of the previous pixel data which is provided prior to the first pixel data is positive, and the polarity state of the first pixel data remains at a positive polarity. 
     
     
         3 . The driving circuit adapted for driving the data line of the display panel according to  claim 2 , wherein the first predetermined table includes a second mapping table, where the second mapping table is applied when the polarity state of the previous pixel data which is provided prior to the first pixel data is negative, and the polarity state of the first pixel data remains at a negative polarity. 
     
     
         4 . The driving circuit adapted for driving the data line of the display panel according to  claim 3 , wherein the first mapping table includes a plurality of entries, and each of the plurality of entries of the first mapping table corresponds to an entry of the second mapping table, and wherein at least one of the plurality of entries of the first mapping table is different from the corresponding entry of the second mapping table. 
     
     
         5 . The driving circuit adapted for driving the data line of the display panel according to  claim 1 , wherein the second predetermined table includes a third mapping table, where the third mapping table is applied when the polarity state of the previous pixel data which is provided prior to the second pixel data is positive, and the polarity state of the second pixel data is switched to have a negative polarity. 
     
     
         6 . The driving circuit adapted for driving the data line of the display panel according to  claim 5 , wherein the second predetermined table includes a fourth mapping table, where the fourth mapping table is applied when the polarity state of the previous pixel data which is provided prior to the second pixel data is negative, and the polarity state of the second pixel data is switched to have a positive polarity. 
     
     
         7 . The driving circuit adapted for driving the data line of the display panel according to  claim 6 , wherein the third mapping table includes a plurality of entries, and each of the plurality of entries of the third mapping table corresponds to an entry of the fourth mapping table, and wherein at least one of the plurality of entries of the third mapping table is different from the corresponding entry of the fourth mapping table. 
     
     
         8 . The driving circuit adapted for driving the data line of the display panel according to  claim 1 , wherein the first pixel data is outputted immediately following the previous pixel data which is provided prior to the first pixel data to drive the data line. 
     
     
         9 . The driving circuit adapted for driving the data line of the display panel according to  claim 8 , wherein the first pixel data and the previous pixel data provided prior to the first pixel data are respectively outputted to drive each of two adjacent sub-pixel units of the display panel, and the two adjacent sub-pixel units are configured using a common data line on the display panel. 
     
     
         10 . The driving circuit adapted for driving the data line of the display panel according to  claim 1 , wherein the second pixel data is outputted immediately following the previous pixel data which is provided prior to the second pixel data to drive the data line. 
     
     
         11 . The driving circuit adapted for driving the data line of the display panel according to  claim 10 , wherein the second pixel data and the previous pixel data which is provided prior to the second pixel data are respectively outputted to drive each of two adjacent sub-pixel units of the display panel, and the two adjacent sub-pixel units are configured using a common data line on the display panel. 
     
     
         12 . A method for driving a data line of a display panel, comprising:
 providing at least one predetermined table, by a controller circuit, wherein the at least one predetermined table is selected and applied according to a polarity state of a pixel data in related to a polarity state of a previous pixel data which is provided prior to the pixel data;   examining the polarity state of the pixel data and the polarity state of the previous pixel data which is provided prior to the pixel data to select a first predetermined table or a second predetermined table from the at least one predetermined table;   applying the first predetermined table to generate a first pixel data associated with a first pixel voltage to drive the data line of the display panel, or applying the second predetermined table to generate a second pixel data associated with a second pixel voltage to drive the data line of the display panel, wherein the first predetermined table is applied when a polarity state of the first pixel data and a polarity state of a previous pixel data which is provided prior to the first pixel data are identical, and the second predetermined table is applied when a polarity state of the second pixel data and a polarity state of a previous pixel data which is provided prior to the second pixel data are different; and   receiving the first pixel voltage or the second pixel voltage by a driving circuit when either the first predetermined table or the second predetermined table is selected and being applied, so as to drive the data line of the display panel with the first pixel voltage or the second pixel voltage.   
     
     
         13 . The method for driving the data line of the display panel according to  claim 12 , wherein the first predetermined table includes a first mapping table, where the first mapping table is applied when the polarity state of the previous pixel data which is provided prior to the first pixel data is positive, and the polarity state of the first pixel data remains at a positive polarity. 
     
     
         14 . The method for driving the data line of the display panel according to  claim 13 , wherein the first predetermined table includes a second mapping table, where the second mapping table is applied when the polarity state of the previous pixel data which is provided prior to the first pixel data is negative, and the polarity state of the first pixel data remains at a negative polarity. 
     
     
         15 . The method for driving the data line of the display panel according to  claim 14 , wherein the first mapping table includes a plurality of entries, and each of the plurality of entries of the first mapping table corresponds to an entry of the second mapping table, and wherein at least one of the plurality of entries of the first mapping table is different from the corresponding entry of the second mapping table. 
     
     
         16 . The method for driving the data line of the display panel according to  claim 12 , wherein the second predetermined table includes a third mapping table, where the third mapping table is applied when the polarity state of the previous pixel data which is provided prior to the second pixel data is positive, and the polarity state of the second pixel data is switched to have a negative polarity. 
     
     
         17 . The method for driving the data line of the display panel according to  claim 16 , wherein the second predetermined table includes a fourth mapping table, where the fourth mapping table is applied when the polarity state of the previous pixel data which is provided prior to the second pixel data is negative, and the polarity state of the second pixel data is switched to have a positive polarity. 
     
     
         18 . The method for driving the data line of the display panel according to  claim 17 , wherein the third mapping table includes a plurality of entries, and each of the plurality of entries of the third mapping table corresponds to an entry of the fourth mapping table, and wherein at least one of the plurality of entries of the third mapping table is different from the corresponding entry of the fourth mapping table. 
     
     
         19 . The method for driving the data line of the display panel according to  claim 12 , wherein the first pixel data is outputted immediately following the previous pixel data which is provided prior to the first pixel data to drive the data line. 
     
     
         20 . The method for driving the data line of the display panel according to  claim 19 , wherein the first pixel data and the previous pixel data provided prior to the first pixel data are respectively outputted to drive each of two adjacent sub-pixel units of the display panel, and the two adjacent sub-pixel units are configured using a common data line on the display panel. 
     
     
         21 . The method for driving the data line of the display panel according to  claim 12 , wherein the second pixel data is outputted immediately following the previous pixel data which is provided prior to the second pixel data to drive the data line. 
     
     
         22 . The method for driving the data line of the display panel according to  claim 21 , wherein the second pixel data and the previous pixel data which is provided prior to the second pixel data are respectively outputted to drive each of two adjacent sub-pixel units of the display panel, and the two adjacent sub-pixel units are configured using a common data line on the display panel. 
     
     
         23 . A method of establishing at least one predetermined table for a driving circuit adapted for driving a data line of a display panel, wherein the display panel includes a plurality of sub-pixel units, each of the plurality of sub-pixel units is driven by a pixel voltage associated with a pixel data to show brightness, the method comprising:
 examining a polarity state of the pixel data and a polarity state of a previous pixel data which is provided prior to the pixel data to determine one of the at least one predetermined table for establishing;   providing a given value of the pixel data for showing a reference brightness and sensing the reference brightness by an optical sensor;   comparing the reference brightness to an ideal brightness which is expected to be shown, and adjusting the given value to a final value until a final brightness corresponding to the final value is identical to the ideal brightness;   recording the final value of the pixel data as one entry of the predetermined table for establishing; and   collecting a plurality of the entries so as to form the predetermined table for establishing.   
     
     
         24 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 23 , wherein a first mapping table is established when the polarity state of the previous pixel data which is provided prior to the pixel data is positive, and the polarity state of the pixel data remains at a positive polarity. 
     
     
         25 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 24 , wherein a second mapping table is established when the polarity state of the previous pixel data which is provided prior to the pixel data is negative, and the polarity state of the pixel data remains at a negative polarity. 
     
     
         26 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 25 , wherein each of the plurality of the entries of the first mapping table corresponds to an entry of the second mapping table, and wherein at least one of the plurality of the entries of the first mapping table is different from the corresponding entry of the second mapping table. 
     
     
         27 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 23 , wherein a third mapping table is established when the polarity state of the previous pixel data which is provided prior to the pixel data is positive, and the polarity state of the pixel data is switched to have a negative polarity. 
     
     
         28 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 27 , wherein a fourth mapping table is established when the polarity state of the previous pixel data which is provided prior to the pixel data is negative, and the polarity state of the pixel data is switched to have a positive polarity. 
     
     
         29 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 28 , wherein each of the plurality of the entries of the third mapping table corresponds to an entry of the fourth mapping table, and wherein at least one of the plurality of the entries of the third mapping table is different from the corresponding entry of the fourth mapping table. 
     
     
         30 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 23 , wherein the pixel data is outputted immediately following the previous pixel data which is provided prior to the pixel data to drive the data line. 
     
     
         31 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 23 , wherein the pixel data and the previous pixel data which is provided prior to the pixel data are respectively outputted to drive each of two adjacent sub-pixel units of the display panel, and the two adjacent sub-pixel units are configured using a common data line on the display panel. 
     
     
         32 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 23 , further comprising: recording the given value of the pixel data as one entry of the predetermined table for establishing when the reference brightness is identical to the ideal brightness. 
     
     
         33 . The method of establishing the at least one predetermined table for the driving circuit adapted for driving the data line of the display panel according to  claim 23 , further comprising:
 examining if all entries of the predetermined table for establishing are recorded and collected; and   repeatedly providing the given value and adjusting the given value to the final value for collecting all entries so as to form the predetermined table.